Pen nib



FIG. 1 is a perspective view of a pen nib showing my new design;

FIG. 2 is a front elevational view of the embodiment of FIG. 1;

FIG. 3 is a rear elevational view of the embodiment of FIG. 1;

FIG. 4 is a side elevational view of the embodiment of FIG. 1, the opposite side being a mirror image thereof; and,

FIG. 5 is a top plan view of the embodiment of FIG. 1.

The broken lines shown in FIGS. 1-5 are for illustrative purposes only, and form no part of the claimed design. 

The ornamental design for a pen nib, as shown and described. 